Principle of high-frequency scalpel: high-frequency scalpel is a frequency transformer, which will be 220V/50Hz low-voltage low-frequency current through the frequency transformer, power amplification is converted to a frequency of 400kHz ~ 1,000kHz, the voltage of several thousand or even tens of thousands of volts of high-frequency current. Such high-frequency current can produce cutting and coagulation effects on human tissues.